Extraction of Cellulose Nanocrystals with Structure I and II and Their Applications for Reduction of Graphene Oxide and Nanocomposite Elaboration

Khili, Faouzia; Borges, João Paulo; Almeida, Pedro L.; Boukherroub, Rabah; Omrani, Amel Dakhlaoui

doi:10.1007/s12649-018-0202-4

Cited by 44 publications

(29 citation statements)

References 59 publications

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“…As shown in the Figure 5, CMC showed four crystalline peaks at 22.6°, 15.3°, 16.5°, and 34.7°. However, CNC presented crystalline peaks at 23.0°, 15.6°, 16.4°, and 34.6°, indicating a crystal structure of cellulose I [44]. On the basis of obtained crystallinity indexes (CMC = 0.50, CNC = 0.58), it is noticed that CNC is more crystalline than CMC.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Cellulose Nanocrystal/Silver/Alginate Bionanocomposite Films with Enhanced Mechanical and Barrier Properties for Food Packaging Application

2019

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Eco-friendly cellulose nanocrystal/silver/alginate (CNC/Ag/Alg) bionanocomposite films were successfully prepared by blending of CNC with Ag/Alg solution. The CNC was fabricated from cellulose microcrystal (CMC) by acid hydrolysis method. The Ag nanoparticles (AgNPs) were generated by using Alg as a reducing agent through hydrothermal process. AgNPs-included composite films showed characteristic plasmonic effect of the AgNPs with the maximum absorption at 491 nm and they also showed high ultraviolet (UV) barrier properties. The CNC/Ag/Alg composite films were analyzed by using scanning electron microscopy, transmission electron microscopy, optical microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction technique. Depending on the type of nanofillers, tensile strength of the composite films increased by 39–57% and water vapor permeation decreased by 17–36% compared with those of the neat Alg films. The Ag/Alg and CNC/Ag/Alg films showed brown color as detected from the increase of both ‘b’ and ‘a’ parameters by colorimeter. The UV and water barrier properties of Alg based composite films were found higher than the Alg films. The obtained results suggested that the prepared composite films can be used in food packaging applications.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Cellulose Nanocrystal/Silver/Alginate Bionanocomposite Films with Enhanced Mechanical and Barrier Properties for Food Packaging Application

2019

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“…However, surprisingly and to the best of our knowledge, this method has gone largely unnoticed thereafter, in favor of mercerization, until just very recently a few authors have started to apply it again. 15,16 Despite being widely reported in the literature for the last decade, type-II cellulose nanocrystals have been highly disregarded in terms of potential applications, as the majority of scientific studies only focus in their preparation and characterization .8,9,17,18 NCC types I and II do not only differ in their crystalline structure and morphology, but also in their properties and behavior. From the very scarce studies that paid attention to this fact, it is known that in Pickering emulsions, the emulsion ratio is higher and droplet sizes are smaller when made upon type-I NCC in comparison to type-II.…”

Section: Introductionmentioning

confidence: 99%

Unique Properties and Behavior of Nonmercerized Type-II Cellulose Nanocrystals as Carbon Nanotube Biocompatible Dispersants

et al. 2019

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Nanocellulose is increasingly being investigated as a paradigm of a sustainable nanomaterial, because of its extraordinary physical and chemical properties, together with its renewable nature and worldwide abundance. The rich structural diversity in cellulose materials is represented by different crystalline allomorphs, from which types I and II stand out. While type I is naturally and ubiquitously

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“…For nanocellulose, the significant decrease of C2 (C-O) and significant increase of C4 (O-C O) indicated that parts of the hydroxyl groups in cellulose chains were oxidized into carboxyl groups during the oxidation/ sonication process. XPS is also a useful technique to study the various functional groups inserted onto nanocellulose surface during different methods of extraction (Khili et al, 2019;Xu and Gu, 2020).…”

Section: Properties and Characterization Of Nanocellulosementioning

confidence: 99%

Nanocellulose: Resources, Physio-Chemical Properties, Current Uses and Future Applications

Kaur¹,

Sharma²,

Munagala³

et al. 2021

Front. Nanotechnol.

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The growing environmental concerns due to the excessive use of non-renewable petroleum based products have raised interest for the sustainable synthesis of bio-based value added products and chemicals. Recently, nanocellulose has attracted wide attention because of its unique properties such as high surface area, tunable surface chemistry, excellent mechanical strength, biodegradability and renewable nature. It serves wide range of applications in paper making, biosensor, hydrogel and aerogel synthesis, water purification, biomedical industry and food industry. Variations in selection of source, processing technique and subsequent chemical modifications influence the size, morphology, and other characteristics of nanocellulose and ultimately their area of application. The current review is focused on extraction/synthesis of nanocellulose from different sources such as bacteria and lignocellulosic biomass, by using various production techniques ranging from traditional harsh chemicals to green methods. Further, the challenges in nanocellulose production, physio-chemical properties and applications are discussed with future opportunities. Finally, the sustainability of nanocellulose product as well as processes is reviewed by taking a systems view. The impact of chemicals, energy use, and waste generated can often negate the benefit of a bio-based product. These issues are evaluated and future research needs are identified.

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Extraction of Cellulose Nanocrystals with Structure I and II and Their Applications for Reduction of Graphene Oxide and Nanocomposite Elaboration

Cited by 44 publications

References 59 publications

Fabrication of Cellulose Nanocrystal/Silver/Alginate Bionanocomposite Films with Enhanced Mechanical and Barrier Properties for Food Packaging Application

Fabrication of Cellulose Nanocrystal/Silver/Alginate Bionanocomposite Films with Enhanced Mechanical and Barrier Properties for Food Packaging Application

Unique Properties and Behavior of Nonmercerized Type-II Cellulose Nanocrystals as Carbon Nanotube Biocompatible Dispersants

Nanocellulose: Resources, Physio-Chemical Properties, Current Uses and Future Applications

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